Ophthalmic mounting.



G. H. DAY.

OPHTHALMIC MOUNTING.

APPLICATION FILED MAY 5,1915.

1,235,662. Patented Aug. 7,1917.

WITNESSES. IN l/E N TOR M i/ Geo z geliig j v Q BY A TTOR/VEVS Wa ren erm ne mamas @FMGEE.

GEORGE H. DAY, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR T AMERICAN OPTICAL COMPANY, OF SOUTHBEIDGE, MASSACHUSETTS.

OPHTHALMIC MOUNTING.

To all whom it may concern: Be it known that I, GEORGE H. DAY, a c1t1- zen of the United States, residing at South ophthalmic mountings, and-has for its pri- Y mary object to provide means for preventing rotation of lenses within the1r frames. Another object is to so place the means for preventing .rotationof the lenses wlthin the frame as to render them entirely invisible. v y I -Still another object is to provide means especially. adapted for use upon composi- I tion frames for the purpose above set forth and to so construct the means as to prevent their accidental disengagement from the frame.

With the foregoing and other objects in view, the invention consists inthe novel features ofconstruction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawings, and claimed.

In the drawings: 7 Figure I is a front elevation of a frame and lenses therefor constructed inaccordance with the invention.

Fig. II is a face view of one of the lenses. Fig. III is a detail sectional view on the line 111' 111 of Fig. I.

. Fig. IV is a detail perspective view of the locking member.

Fig. V isa side elevation ,of a slightly modified form of locking inemben' 40 Fig.- VI is a similar view of another slightly modified form of locking member. Referring to the drawings by numerals, 11 designates the lenses. which are herein shown as being circular inshape and as having their edges beveled for engagement in the annular grooves 2 of the frame 3. The frame herein shown is preferably constructed from a suitable composition such as zylonite or the like, and includes the lens portion or frames 3, the connecting bridge 4:

- and the offset lugs 5 to which the temples are adapted to be secured. It will beobvlous that because of they shape 'of the lenses and frames with which they are engaged, there will be a tendency of the lenses to rotate Specification of Letters Patent.

cone point 9 for engagement in the slot 7 of Patented Aug. "7, 1917.

Application fil ed May 5, 1915. Serial No. 25,987.

within the frames unless some means is provided for positively preventing such actlon. V

In order to hold the lenses securely within the frame and prevent rotation thereof, I embed in the material of the frame, ref- 'erably when the same is in a soft con ition during course of its manufacture, the frustopyramldically shaped locking members 6.

hese members are preferably disposed at diametrically opposlte points upon the frames at the enlarged portions thereof caused by. forming the bridge l and the lugs 5, butit will be understood that any other preferred location of these members I I may be made. The larger or base end of the members 6 are placed within the frame in a position so that they face the outer por- I I tion thereof; the smaller or inner portionsof the members projectin into the groove 2, .75 I

as is clearly illustrated m Fig. 111 of the drawings. By so placing the locking members within the frame it will be seen that their accidental disengagement therefrom is positively prevented.

Each of the lenses 1 vis provided with a pair of diametrically oppositely disposed slots or recesses 7, into which the inner portion of the locking members 6 are adapted to engage when the lenses are positioned 851 within'the grooves of the frame. By so placing the inner portions of the members 6 111 engagement w1th the grooves 7 of the lenses 1, it will be readily seen that rotation of the lenses within theframe. is

statediI-wish to have it understood that but one or a plurality of the locking members may be used and may be positioned at any convenient point or points within the frame. In Fig. V of the drawings I have shown the 'frustum 8 as being provided with the the lens 1, the saidfrustum being provided with annular ooves or recesses 10, into which the composition of the frame is adapted to engage to prevent disengagement'of this form of member from the frame.

though 96 In Fig. VI of the drawings I have illustrated another slightly modified form of locking member which is shown as comprising the cylindrically shaped portion 11 having the annular corrugatlons or threads upon the outer face thereof for engagement in the composition of the frame to prevent removal of the member therefrom, and as being provided with the cone polnt 12 for engagement in the slots of the lenses in a manner similar to the members 6 and 9.

From the foregoing description taken in connection with the accompanying drawmgs, it is thought that the construction'and advantages of the improved mountlng should be apparent, and while I have herein shown and described certain specific forms of my invention 1 do not wish to be limited to any particular construction or arrangement of the parts except to such limitations as the claims may import.

I claim: I 1. In an ophthalmic mounting, the COIl'lblnation with a round eye lens receiving frame having a groove for the reception of the lens, of a lens fitted within the groove and provided with a notch in the periphery thereof and a locking projection carried by the frame and dlsposed entirely within the groove and outside the inner peri hery of the frame, said projection being a apted to interlock with the notch in the lens to secure the lens against accidental rotation Within the frame. I

2. The combination with a non-metallic circular lens frame having a groove for the reception of a lens, of a locking device to revent accidental rotation of the lens in he frame, said locking device having a portion embedded in the frame and a portion projecting into the groove of the frame, the entire locking device being disposed below the 11 per edge of the groove whereby it is invisi le when the frame is viewed from the front,

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE H. DAY.

Witnesses:

CARROLL BAILEY, Josnrn J. DEM'ERS. 

